Maritime transport logistics outgrows the competence of classic freight forwarders deleting the boundaries among forwarders, brokers, and carriers and creates a new profession, logistics operator. They are now faced with the need for careful planning and coordination among multiple parties for shifting the freight logistics industry towards more sustainable goals. Significant need for political and operational respect of principles of sustainable development, and also external costs in this context, undertakes logistics operators to review their solutions in accordance with adequate knowledge, skills, and competencies. It is particularly important in forecasting the external costs which are not a central business interest. The above mentioned competencies are described focusing on subjects (issues and knowledges) through whom logistics operators should be trained. Moreover, logistics operators have a greater responsibility towards carriers but also an opportunity to reduce not only the cost of transportation but also the external costs within the logistic supply chain. In this paper calculation of external costs is, practically, shown in the example of towing in the port. The old education programs were compared with the new demands of the market. The substantial difference was evident in the subject of Marine Ecology whose content is becoming the central issue of sustainability of transport modalities. New competencies of logistics operators will become the relevant factor of sustainable development and competitiveness on the freight logistics market. That confirm the analysed current projects about present trends in the transport sector in which the green logistics including external costs become the important and binding element of cargo flow planning.